Autonomous Curtailment Control in Distributed Generation Planning

Abstract

While enabling prominent growth of renewablebased distributed generation (DG) and matching energy harvesting, nonfirm connection policy requires accompanying active and reactive power dispatch control. Centralized control often implies comprehensive communication infrastructure and notable capital investment. Hence, DG planning models tailored for decentralized management of thermal and voltage constraints are found wanting. This paper presents a DG planning methodology, which successfully incorporates a new decentralized active power curtailment control and also includes decentralized voltage control. It optimizes autonomous control settings for each generator individually, such that the net energy export from the distribution to transmission level, per unit of installed capacity, is maximized. Comparative time series analysis validates the methodology.Index Terms-Distributed generation (DG), network planning, optimal power flow (OPF), power curtailment control.

Probabilistic Under Frequency Load Shedding Considering RoCoF Relays of Distributed Generators

“…In addition of such uncertainties, the integration of small scale generating units or DGs causes new problems in protection and control schemes. The impacts of DG connection on distribution networks are discussed in [17]. The RoCoF relays of DG units are tuned to detect islanding conditions by measuring the rate-of-change-of-frequency.…”

“…It should be noted that (16) is the discretized system frequency response based on the swing equation and (17) to (19) represent all sources of load and generation changes including input disturbance (i.e. generation outage), governor action, load damping, load shedding, and DG tripping.…”

Optimised curtailment of distributed generators for the provision of congestion management services considering discrete controllability

“…Congestion management algorithms can be designed as decentralised [24] as well as centralised [17] approaches and are often based on power flow analysis of the considered network. In [25] different approaches for linearisation of the power flow equations to describe the effects of changes in nodal power injections on the grid state are compared.…”

Modified reactive power allocation strategy for large‐scale offshore wind turbine considering subsystem configuration

“…Some studies implied that the proportional reactive power dispatch algorithm is able to reduce electrical loss [21–23]. In these techniques, dispatch of reactive power references is different from other optimising solutions such as an optimal power flow with curtailment option in [24], or a modified optimal reactive power flow in [25]. Wang et al [21] presented an optimal reactive power‐dispatch method that takes the transmission level into account in order to minimise electrical loss.…”